Laser welding is one of many techniques for joining materials. The main benefit resulting from using a laser for this technique is high processing speeds with no tool wear due to a contact free process. The process leaves low heat affected zones and low part distortion resulting in small welding seams with very little need for post processing. Process speed is dependent on the laser type used, its power, the material type and the weld geometry.
A large variety of materials with different thicknesses can be welded with various methods. Typically all metals, which can be welded by conventional technology, can be welded by laser. These are steel and aluminum parts but also copper used in the electronics industry. Laser welding of metal can be differentiated between keyhole welding and heat conduction welding. A selection of plastics can be successfully welded by using a diode laser.